Escape 4WD L4-2.5L (2010)
No
REPAIR the affected circuit(s). TEST the system for normal operation.
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B4 CHECK THE AC POWER POINT LED
-
Test the diode between AC power point C2292-5, component side and AC power point C2292-6, component side in both directions.
-
Is the resistance greater than 10,000 ohms in one direction and between 10-20 ohms in the opposite direction?
Yes
INSTALL a new DC/AC inverter. REFER to Direct Current/Alternating Current (DC/AC) Inverter See: Service and Repair/High Voltage
Converter/Inverter/Direct Current/Alternating Current (DC/AC) Inverter. TEST the system for normal operation.
No
INSTALL a new AC power point. REFER to Alternating Current (AC) Powerpoint See: Service and Repair/High Voltage
Converter/Inverter/Alternating Current (AC) Powerpoint. TEST the system for normal operation.
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Pinpoint Test C: The DC/DC Converter Does Not Operate Correctly
High-Voltage Converter/Inverter
Pinpoint Tests
Pinpoint Test C: The DC/DC Converter Does Not Operate Correctly
Refer to Wiring Diagram Set 12 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Charging System for schematic and connector information. See:
Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The DC/DC converter is a liquid-cooled component that converts high voltage (216-397 volts) DC power to low voltage (12 volts) DC power while
maintaining electrical isolation between the 2 DC power systems. The converter steps down the high voltage to 12 volts, providing power to the vehicle
low voltage battery system. The PCM controls the operation of the DC/DC converter through an enable input from the PCM to the DC/DC converter.
This pinpoint test is intended to diagnose the following:
-
PCM
-
12-volt battery
-
Battery cables
-
DC/DC converter
PINPOINT TEST C: THE DC/DC CONVERTER DOES NOT OPERATE CORRECTLY
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C1 CHECK THE PCM FOR DTCs
-
Enter the following diagnostic mode on the scan tool: Self Test/Retrieve and Record On-Demand and Continuous Memory Diagnostic Trouble
Codes (CMDTCs).
-
Are any PCM DTCs present?
Yes
